#include <mach-o/rld.h>
#include <streams/streams.h>
#include <stdlib.h>

static char* lastError = NULL;

static NXStream* OpenError()
{
    return NXOpenMemory(NULL, 0, NX_WRITEONLY);
}

static void CloseError(NXStream* s)
{
    if (s)
	NXCloseMemory (s, NX_FREEBUFFER);
}

static void TransferError(NXStream* s)
{
    char *buffer;
    int len, maxlen;

    if (lastError)
        free (lastError);
    NXGetMemoryBuffer (s, &buffer, &len, &maxlen);
    lastError = malloc (len + 1);
    strcpy (lastError, buffer);
}

void* next_dlopen(char* name)
{
    int rld_success;
    NXStream* errorStream;
    char* result = NULL;
    char **p;
	
    errorStream = OpenError();
    p = calloc (2, sizeof(void*));
    p[0] = name;
    rld_success = rld_load(errorStream, NULL, p, NULL);
    free (p);

    if (!rld_success) {
	TransferError (errorStream);
	result = (char*)1;
    }
    CloseError (errorStream);
    return result;
}

int next_dlclose(void* handle)
{
    return 0;
}

void* next_dlsym (void *handle, char *symbol)
{
    NXStream* errorStream = OpenError();
    char symbuf[1024];
    unsigned long symref = 0;

    sprintf(symbuf, "_%s", symbol);
    if (!rld_lookup (errorStream, symbuf, &symref))
	TransferError(errorStream);
    CloseError(errorStream);
    return (void*) symref;
}

char* next_dlerror(void)
{
    return lastError;
}
